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largest water canal - China
July 27, 2022

China plans to build world’s largest water canal from Three Gorges Dam to Shanghai

As part of its South-to-North Water Diversion Project, China has initiated works on building an 870-mile (1,400 km) long open canal, the largest in the world, South China Morning Post (SCMP) reported

The slowdown in economic activity due to the coronavirus pandemic has prompted the Chinese government to spend on large-scale projects to stimulate growth. Last month, we reported how the country had quadrupled its plans for hydro energy storage after laying them out just three months ago. 

However, the South-to-North Water Diversion Project is not a new undertaking but has been in the works for over five decades. The eastern and southern parts of China have a water surplus, while the north and east face a severe shortage. The idea of the water diversion is to make water accessible to arid areas. It has sent 54 billion cubic meters of water from the Yangtze River to northern China since 2014, when a part of the project became operational. 

The Yinjiangbuhan tunnel

Under the new phase of the project, China aims to drain water from the Three Gorges Dam to the Han River, a tributary of the Yangtze River. Water from the Dam will be sent to the Danjiangkou reservoir at the lower reaches of the Han through the Yinjiangbuhan tunnel, a large open canal. 

Compared to the Päijänne in Finland, which stretches a little over 74 miles (120 km), the Yinjiangbuhan tunnel is expected to run over 870 miles (1,400 km), with some of its parts running nearly 3,300 feet (1,000 m) underground as compared to the 426 feet (130 m) that the Finnish tunnel goes into the bedrock. 

Keep reading on interestingengineering.com


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